Mercurial > sdl-ios-xcode
annotate src/video/SDL_RLEaccel.c @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 10 Jul 2006 21:04:37 +0000 |
| parents | 84de7511f79f |
| children | 926294b2bb4e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* | |
| 25 * RLE encoding for software colorkey and alpha-channel acceleration | |
| 26 * | |
| 27 * Original version by Sam Lantinga | |
| 28 * | |
| 29 * Mattias Engdegård (Yorick): Rewrite. New encoding format, encoder and | |
| 30 * decoder. Added per-surface alpha blitter. Added per-pixel alpha | |
| 31 * format, encoder and blitter. | |
| 32 * | |
| 33 * Many thanks to Xark and johns for hints, benchmarks and useful comments | |
| 34 * leading to this code. | |
| 35 * | |
| 36 * Welcome to Macro Mayhem. | |
| 37 */ | |
| 38 | |
| 39 /* | |
| 40 * The encoding translates the image data to a stream of segments of the form | |
| 41 * | |
| 42 * <skip> <run> <data> | |
| 43 * | |
| 44 * where <skip> is the number of transparent pixels to skip, | |
| 45 * <run> is the number of opaque pixels to blit, | |
| 46 * and <data> are the pixels themselves. | |
| 47 * | |
| 48 * This basic structure is used both for colorkeyed surfaces, used for simple | |
| 49 * binary transparency and for per-surface alpha blending, and for surfaces | |
| 50 * with per-pixel alpha. The details differ, however: | |
| 51 * | |
| 52 * Encoding of colorkeyed surfaces: | |
| 53 * | |
| 54 * Encoded pixels always have the same format as the target surface. | |
| 55 * <skip> and <run> are unsigned 8 bit integers, except for 32 bit depth | |
| 56 * where they are 16 bit. This makes the pixel data aligned at all times. | |
| 57 * Segments never wrap around from one scan line to the next. | |
| 58 * | |
| 59 * The end of the sequence is marked by a zero <skip>,<run> pair at the * | |
| 60 * beginning of a line. | |
| 61 * | |
| 62 * Encoding of surfaces with per-pixel alpha: | |
| 63 * | |
| 64 * The sequence begins with a struct RLEDestFormat describing the target | |
| 65 * pixel format, to provide reliable un-encoding. | |
| 66 * | |
| 67 * Each scan line is encoded twice: First all completely opaque pixels, | |
| 68 * encoded in the target format as described above, and then all | |
| 69 * partially transparent (translucent) pixels (where 1 <= alpha <= 254), | |
| 70 * in the following 32-bit format: | |
| 71 * | |
| 72 * For 32-bit targets, each pixel has the target RGB format but with | |
| 73 * the alpha value occupying the highest 8 bits. The <skip> and <run> | |
| 74 * counts are 16 bit. | |
| 75 * | |
| 76 * For 16-bit targets, each pixel has the target RGB format, but with | |
| 77 * the middle component (usually green) shifted 16 steps to the left, | |
| 78 * and the hole filled with the 5 most significant bits of the alpha value. | |
| 79 * i.e. if the target has the format rrrrrggggggbbbbb, | |
| 80 * the encoded pixel will be 00000gggggg00000rrrrr0aaaaabbbbb. | |
| 81 * The <skip> and <run> counts are 8 bit for the opaque lines, 16 bit | |
| 82 * for the translucent lines. Two padding bytes may be inserted | |
| 83 * before each translucent line to keep them 32-bit aligned. | |
| 84 * | |
| 85 * The end of the sequence is marked by a zero <skip>,<run> pair at the | |
| 86 * beginning of an opaque line. | |
| 87 */ | |
| 88 | |
| 89 #include "SDL_video.h" | |
| 90 #include "SDL_sysvideo.h" | |
| 91 #include "SDL_blit.h" | |
| 92 #include "SDL_RLEaccel_c.h" | |
| 93 | |
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94 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && SDL_ASSEMBLY_ROUTINES |
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95 #define MMX_ASMBLIT |
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96 #endif |
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97 |
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98 #ifdef MMX_ASMBLIT |
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99 #include "mmx.h" |
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100 #include "SDL_cpuinfo.h" |
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101 #endif |
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102 |
| 0 | 103 #ifndef MAX |
| 104 #define MAX(a, b) ((a) > (b) ? (a) : (b)) | |
| 105 #endif | |
| 106 #ifndef MIN | |
| 107 #define MIN(a, b) ((a) < (b) ? (a) : (b)) | |
| 108 #endif | |
| 109 | |
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110 #define PIXEL_COPY(to, from, len, bpp) \ |
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111 do { \ |
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112 if(bpp == 4) { \ |
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113 SDL_memcpy4(to, from, (size_t)(len)); \ |
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114 } else { \ |
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115 SDL_memcpy(to, from, (size_t)(len) * (bpp)); \ |
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116 } \ |
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117 } while(0) |
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118 |
| 0 | 119 /* |
| 120 * Various colorkey blit methods, for opaque and per-surface alpha | |
| 121 */ | |
| 122 | |
| 123 #define OPAQUE_BLIT(to, from, length, bpp, alpha) \ | |
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124 PIXEL_COPY(to, from, length, bpp) |
| 0 | 125 |
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126 #ifdef MMX_ASMBLIT |
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127 |
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128 #define ALPHA_BLIT32_888MMX(to, from, length, bpp, alpha) \ |
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129 do { \ |
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130 Uint32 *srcp = (Uint32 *)(from); \ |
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131 Uint32 *dstp = (Uint32 *)(to); \ |
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132 int i = 0x00FF00FF; \ |
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133 movd_m2r(*(&i), mm3); \ |
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134 punpckldq_r2r(mm3, mm3); \ |
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135 i = 0xFF000000; \ |
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136 movd_m2r(*(&i), mm7); \ |
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137 punpckldq_r2r(mm7, mm7); \ |
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138 i = alpha | alpha << 16; \ |
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139 movd_m2r(*(&i), mm4); \ |
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140 punpckldq_r2r(mm4, mm4); \ |
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141 pcmpeqd_r2r(mm5,mm5); /* set mm5 to "1" */ \ |
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142 pxor_r2r(mm7, mm5); /* make clear alpha mask */ \ |
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143 i = length; \ |
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144 if(i & 1) { \ |
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145 movd_m2r((*srcp), mm1); /* src -> mm1 */ \ |
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146 punpcklbw_r2r(mm1, mm1); \ |
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147 pand_r2r(mm3, mm1); \ |
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148 movd_m2r((*dstp), mm2); /* dst -> mm2 */ \ |
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149 punpcklbw_r2r(mm2, mm2); \ |
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150 pand_r2r(mm3, mm2); \ |
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151 psubw_r2r(mm2, mm1); \ |
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152 pmullw_r2r(mm4, mm1); \ |
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153 psrlw_i2r(8, mm1); \ |
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154 paddw_r2r(mm1, mm2); \ |
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155 pand_r2r(mm3, mm2); \ |
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156 packuswb_r2r(mm2, mm2); \ |
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157 pand_r2r(mm5, mm2); /* 00000RGB -> mm2 */ \ |
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158 movd_r2m(mm2, *dstp); \ |
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159 ++srcp; \ |
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160 ++dstp; \ |
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161 i--; \ |
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162 } \ |
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163 for(; i > 0; --i) { \ |
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164 movq_m2r((*srcp), mm0); \ |
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165 movq_r2r(mm0, mm1); \ |
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166 punpcklbw_r2r(mm0, mm0); \ |
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167 movq_m2r((*dstp), mm2); \ |
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168 punpckhbw_r2r(mm1, mm1); \ |
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169 movq_r2r(mm2, mm6); \ |
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170 pand_r2r(mm3, mm0); \ |
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171 punpcklbw_r2r(mm2, mm2); \ |
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172 pand_r2r(mm3, mm1); \ |
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173 punpckhbw_r2r(mm6, mm6); \ |
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174 pand_r2r(mm3, mm2); \ |
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175 psubw_r2r(mm2, mm0); \ |
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176 pmullw_r2r(mm4, mm0); \ |
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177 pand_r2r(mm3, mm6); \ |
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178 psubw_r2r(mm6, mm1); \ |
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179 pmullw_r2r(mm4, mm1); \ |
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180 psrlw_i2r(8, mm0); \ |
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181 paddw_r2r(mm0, mm2); \ |
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182 psrlw_i2r(8, mm1); \ |
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183 paddw_r2r(mm1, mm6); \ |
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184 pand_r2r(mm3, mm2); \ |
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185 pand_r2r(mm3, mm6); \ |
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186 packuswb_r2r(mm2, mm2); \ |
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187 packuswb_r2r(mm6, mm6); \ |
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188 psrlq_i2r(32, mm2); \ |
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189 psllq_i2r(32, mm6); \ |
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190 por_r2r(mm6, mm2); \ |
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191 pand_r2r(mm5, mm2); /* 00000RGB -> mm2 */ \ |
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192 movq_r2m(mm2, *dstp); \ |
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193 srcp += 2; \ |
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194 dstp += 2; \ |
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195 i--; \ |
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196 } \ |
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197 emms(); \ |
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198 } while(0) |
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199 |
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200 #define ALPHA_BLIT16_565MMX(to, from, length, bpp, alpha) \ |
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201 do { \ |
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202 int i, n = 0; \ |
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203 Uint16 *srcp = (Uint16 *)(from); \ |
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204 Uint16 *dstp = (Uint16 *)(to); \ |
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205 Uint32 ALPHA = 0xF800; \ |
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206 movd_m2r(*(&ALPHA), mm1); \ |
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207 punpcklwd_r2r(mm1, mm1); \ |
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208 punpcklwd_r2r(mm1, mm1); \ |
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209 ALPHA = 0x07E0; \ |
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210 movd_m2r(*(&ALPHA), mm4); \ |
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211 punpcklwd_r2r(mm4, mm4); \ |
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212 punpcklwd_r2r(mm4, mm4); \ |
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213 ALPHA = 0x001F; \ |
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214 movd_m2r(*(&ALPHA), mm7); \ |
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215 punpcklwd_r2r(mm7, mm7); \ |
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216 punpcklwd_r2r(mm7, mm7); \ |
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217 alpha &= ~(1+2+4); \ |
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218 i = (Uint32)alpha | (Uint32)alpha << 16; \ |
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219 movd_m2r(*(&i), mm0); \ |
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220 punpckldq_r2r(mm0, mm0); \ |
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221 ALPHA = alpha >> 3; \ |
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222 i = ((int)(length) & 3); \ |
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223 for(; i > 0; --i) { \ |
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224 Uint32 s = *srcp++; \ |
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225 Uint32 d = *dstp; \ |
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226 s = (s | s << 16) & 0x07e0f81f; \ |
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227 d = (d | d << 16) & 0x07e0f81f; \ |
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228 d += (s - d) * ALPHA >> 5; \ |
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229 d &= 0x07e0f81f; \ |
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230 *dstp++ = d | d >> 16; \ |
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231 n++; \ |
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232 } \ |
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233 i = (int)(length) - n; \ |
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234 for(; i > 0; --i) { \ |
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235 movq_m2r((*dstp), mm3); \ |
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236 movq_m2r((*srcp), mm2); \ |
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237 movq_r2r(mm2, mm5); \ |
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238 pand_r2r(mm1 , mm5); \ |
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239 psrlq_i2r(11, mm5); \ |
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240 movq_r2r(mm3, mm6); \ |
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241 pand_r2r(mm1 , mm6); \ |
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242 psrlq_i2r(11, mm6); \ |
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243 psubw_r2r(mm6, mm5); \ |
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244 pmullw_r2r(mm0, mm5); \ |
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245 psrlw_i2r(8, mm5); \ |
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246 paddw_r2r(mm5, mm6); \ |
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247 psllq_i2r(11, mm6); \ |
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248 pand_r2r(mm1, mm6); \ |
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249 movq_r2r(mm4, mm5); \ |
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250 por_r2r(mm7, mm5); \ |
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251 pand_r2r(mm5, mm3); \ |
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252 por_r2r(mm6, mm3); \ |
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253 movq_r2r(mm2, mm5); \ |
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254 pand_r2r(mm4 , mm5); \ |
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255 psrlq_i2r(5, mm5); \ |
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256 movq_r2r(mm3, mm6); \ |
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257 pand_r2r(mm4 , mm6); \ |
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258 psrlq_i2r(5, mm6); \ |
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259 psubw_r2r(mm6, mm5); \ |
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260 pmullw_r2r(mm0, mm5); \ |
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261 psrlw_i2r(8, mm5); \ |
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262 paddw_r2r(mm5, mm6); \ |
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263 psllq_i2r(5, mm6); \ |
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264 pand_r2r(mm4, mm6); \ |
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265 movq_r2r(mm1, mm5); \ |
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266 por_r2r(mm7, mm5); \ |
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267 pand_r2r(mm5, mm3); \ |
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268 por_r2r(mm6, mm3); \ |
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269 movq_r2r(mm2, mm5); \ |
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270 pand_r2r(mm7 , mm5); \ |
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271 movq_r2r(mm3, mm6); \ |
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272 pand_r2r(mm7 , mm6); \ |
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273 psubw_r2r(mm6, mm5); \ |
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274 pmullw_r2r(mm0, mm5); \ |
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275 psrlw_i2r(8, mm5); \ |
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276 paddw_r2r(mm5, mm6); \ |
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277 pand_r2r(mm7, mm6); \ |
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278 movq_r2r(mm1, mm5); \ |
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279 por_r2r(mm4, mm5); \ |
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280 pand_r2r(mm5, mm3); \ |
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281 por_r2r(mm6, mm3); \ |
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282 movq_r2m(mm3, *dstp); \ |
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283 srcp += 4; \ |
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284 dstp += 4; \ |
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285 i -= 3; \ |
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286 } \ |
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287 emms(); \ |
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288 } while(0) |
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289 |
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290 #define ALPHA_BLIT16_555MMX(to, from, length, bpp, alpha) \ |
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291 do { \ |
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292 int i, n = 0; \ |
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293 Uint16 *srcp = (Uint16 *)(from); \ |
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294 Uint16 *dstp = (Uint16 *)(to); \ |
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295 Uint32 ALPHA = 0x7C00; \ |
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296 movd_m2r(*(&ALPHA), mm1); \ |
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297 punpcklwd_r2r(mm1, mm1); \ |
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298 punpcklwd_r2r(mm1, mm1); \ |
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299 ALPHA = 0x03E0; \ |
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300 movd_m2r(*(&ALPHA), mm4); \ |
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301 punpcklwd_r2r(mm4, mm4); \ |
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302 punpcklwd_r2r(mm4, mm4); \ |
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303 ALPHA = 0x001F; \ |
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304 movd_m2r(*(&ALPHA), mm7); \ |
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305 punpcklwd_r2r(mm7, mm7); \ |
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306 punpcklwd_r2r(mm7, mm7); \ |
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307 alpha &= ~(1+2+4); \ |
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308 i = (Uint32)alpha | (Uint32)alpha << 16; \ |
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309 movd_m2r(*(&i), mm0); \ |
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310 punpckldq_r2r(mm0, mm0); \ |
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311 i = ((int)(length) & 3); \ |
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312 ALPHA = alpha >> 3; \ |
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313 for(; i > 0; --i) { \ |
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314 Uint32 s = *srcp++; \ |
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315 Uint32 d = *dstp; \ |
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316 s = (s | s << 16) & 0x03e07c1f; \ |
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317 d = (d | d << 16) & 0x03e07c1f; \ |
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318 d += (s - d) * ALPHA >> 5; \ |
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319 d &= 0x03e07c1f; \ |
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320 *dstp++ = d | d >> 16; \ |
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321 n++; \ |
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322 } \ |
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323 i = (int)(length) - n; \ |
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324 for(; i > 0; --i) { \ |
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325 movq_m2r((*dstp), mm3); \ |
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326 movq_m2r((*srcp), mm2); \ |
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327 movq_r2r(mm2, mm5); \ |
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328 pand_r2r(mm1 , mm5); \ |
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329 psrlq_i2r(10, mm5); \ |
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330 movq_r2r(mm3, mm6); \ |
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331 pand_r2r(mm1 , mm6); \ |
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332 psrlq_i2r(10, mm6); \ |
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333 psubw_r2r(mm6, mm5); \ |
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334 pmullw_r2r(mm0, mm5); \ |
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335 psrlw_i2r(8, mm5); \ |
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336 paddw_r2r(mm5, mm6); \ |
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337 psllq_i2r(10, mm6); \ |
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338 pand_r2r(mm1, mm6); \ |
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339 movq_r2r(mm4, mm5); \ |
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340 por_r2r(mm7, mm5); \ |
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341 pand_r2r(mm5, mm3); \ |
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342 por_r2r(mm6, mm3); \ |
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343 movq_r2r(mm2, mm5); \ |
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344 pand_r2r(mm4 , mm5); \ |
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345 psrlq_i2r(5, mm5); \ |
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346 movq_r2r(mm3, mm6); \ |
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347 pand_r2r(mm4 , mm6); \ |
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348 psrlq_i2r(5, mm6); \ |
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349 psubw_r2r(mm6, mm5); \ |
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350 pmullw_r2r(mm0, mm5); \ |
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351 psrlw_i2r(8, mm5); \ |
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352 paddw_r2r(mm5, mm6); \ |
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353 psllq_i2r(5, mm6); \ |
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354 pand_r2r(mm4, mm6); \ |
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355 movq_r2r(mm1, mm5); \ |
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356 por_r2r(mm7, mm5); \ |
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357 pand_r2r(mm5, mm3); \ |
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358 por_r2r(mm6, mm3); \ |
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359 movq_r2r(mm2, mm5); \ |
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360 pand_r2r(mm7 , mm5); \ |
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361 movq_r2r(mm3, mm6); \ |
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362 pand_r2r(mm7 , mm6); \ |
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363 psubw_r2r(mm6, mm5); \ |
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364 pmullw_r2r(mm0, mm5); \ |
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365 psrlw_i2r(8, mm5); \ |
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366 paddw_r2r(mm5, mm6); \ |
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367 pand_r2r(mm7, mm6); \ |
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368 movq_r2r(mm1, mm5); \ |
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369 por_r2r(mm4, mm5); \ |
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370 pand_r2r(mm5, mm3); \ |
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371 por_r2r(mm6, mm3); \ |
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372 movq_r2m(mm3, *dstp); \ |
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373 srcp += 4; \ |
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374 dstp += 4; \ |
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375 i -= 3; \ |
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376 } \ |
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377 emms(); \ |
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378 } while(0) |
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379 |
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380 #endif |
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381 |
| 0 | 382 /* |
| 383 * For 32bpp pixels on the form 0x00rrggbb: | |
| 384 * If we treat the middle component separately, we can process the two | |
| 385 * remaining in parallel. This is safe to do because of the gap to the left | |
| 386 * of each component, so the bits from the multiplication don't collide. | |
| 387 * This can be used for any RGB permutation of course. | |
| 388 */ | |
| 389 #define ALPHA_BLIT32_888(to, from, length, bpp, alpha) \ | |
| 390 do { \ | |
| 391 int i; \ | |
| 392 Uint32 *src = (Uint32 *)(from); \ | |
| 393 Uint32 *dst = (Uint32 *)(to); \ | |
| 394 for(i = 0; i < (int)(length); i++) { \ | |
| 395 Uint32 s = *src++; \ | |
| 396 Uint32 d = *dst; \ | |
| 397 Uint32 s1 = s & 0xff00ff; \ | |
| 398 Uint32 d1 = d & 0xff00ff; \ | |
| 399 d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; \ | |
| 400 s &= 0xff00; \ | |
| 401 d &= 0xff00; \ | |
| 402 d = (d + ((s - d) * alpha >> 8)) & 0xff00; \ | |
| 403 *dst++ = d1 | d; \ | |
| 404 } \ | |
| 405 } while(0) | |
| 406 | |
| 407 /* | |
| 408 * For 16bpp pixels we can go a step further: put the middle component | |
| 409 * in the high 16 bits of a 32 bit word, and process all three RGB | |
| 410 * components at the same time. Since the smallest gap is here just | |
| 411 * 5 bits, we have to scale alpha down to 5 bits as well. | |
| 412 */ | |
| 413 #define ALPHA_BLIT16_565(to, from, length, bpp, alpha) \ | |
| 414 do { \ | |
| 415 int i; \ | |
| 416 Uint16 *src = (Uint16 *)(from); \ | |
| 417 Uint16 *dst = (Uint16 *)(to); \ | |
|
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418 Uint32 ALPHA = alpha >> 3; \ |
| 0 | 419 for(i = 0; i < (int)(length); i++) { \ |
| 420 Uint32 s = *src++; \ | |
| 421 Uint32 d = *dst; \ | |
| 422 s = (s | s << 16) & 0x07e0f81f; \ | |
| 423 d = (d | d << 16) & 0x07e0f81f; \ | |
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424 d += (s - d) * ALPHA >> 5; \ |
| 0 | 425 d &= 0x07e0f81f; \ |
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426 *dst++ = (Uint16)(d | d >> 16); \ |
| 0 | 427 } \ |
| 428 } while(0) | |
| 429 | |
| 430 #define ALPHA_BLIT16_555(to, from, length, bpp, alpha) \ | |
| 431 do { \ | |
| 432 int i; \ | |
| 433 Uint16 *src = (Uint16 *)(from); \ | |
| 434 Uint16 *dst = (Uint16 *)(to); \ | |
|
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435 Uint32 ALPHA = alpha >> 3; \ |
| 0 | 436 for(i = 0; i < (int)(length); i++) { \ |
| 437 Uint32 s = *src++; \ | |
| 438 Uint32 d = *dst; \ | |
| 439 s = (s | s << 16) & 0x03e07c1f; \ | |
| 440 d = (d | d << 16) & 0x03e07c1f; \ | |
|
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441 d += (s - d) * ALPHA >> 5; \ |
| 0 | 442 d &= 0x03e07c1f; \ |
|
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443 *dst++ = (Uint16)(d | d >> 16); \ |
| 0 | 444 } \ |
| 445 } while(0) | |
| 446 | |
| 447 /* | |
| 448 * The general slow catch-all function, for remaining depths and formats | |
| 449 */ | |
| 450 #define ALPHA_BLIT_ANY(to, from, length, bpp, alpha) \ | |
| 451 do { \ | |
| 452 int i; \ | |
| 453 Uint8 *src = from; \ | |
| 454 Uint8 *dst = to; \ | |
| 455 for(i = 0; i < (int)(length); i++) { \ | |
| 456 Uint32 s, d; \ | |
| 457 unsigned rs, gs, bs, rd, gd, bd; \ | |
| 458 switch(bpp) { \ | |
| 459 case 2: \ | |
| 460 s = *(Uint16 *)src; \ | |
| 461 d = *(Uint16 *)dst; \ | |
| 462 break; \ | |
| 463 case 3: \ | |
| 464 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) { \ | |
| 465 s = (src[0] << 16) | (src[1] << 8) | src[2]; \ | |
| 466 d = (dst[0] << 16) | (dst[1] << 8) | dst[2]; \ | |
| 467 } else { \ | |
| 468 s = (src[2] << 16) | (src[1] << 8) | src[0]; \ | |
| 469 d = (dst[2] << 16) | (dst[1] << 8) | dst[0]; \ | |
| 470 } \ | |
| 471 break; \ | |
| 472 case 4: \ | |
| 473 s = *(Uint32 *)src; \ | |
| 474 d = *(Uint32 *)dst; \ | |
| 475 break; \ | |
| 476 } \ | |
| 477 RGB_FROM_PIXEL(s, fmt, rs, gs, bs); \ | |
| 478 RGB_FROM_PIXEL(d, fmt, rd, gd, bd); \ | |
| 479 rd += (rs - rd) * alpha >> 8; \ | |
| 480 gd += (gs - gd) * alpha >> 8; \ | |
| 481 bd += (bs - bd) * alpha >> 8; \ | |
| 482 PIXEL_FROM_RGB(d, fmt, rd, gd, bd); \ | |
| 483 switch(bpp) { \ | |
| 484 case 2: \ | |
|
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485 *(Uint16 *)dst = (Uint16)d; \ |
| 0 | 486 break; \ |
| 487 case 3: \ | |
| 488 if(SDL_BYTEORDER == SDL_BIG_ENDIAN) { \ | |
|
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489 dst[0] = (Uint8)(d >> 16); \ |
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490 dst[1] = (Uint8)(d >> 8); \ |
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491 dst[2] = (Uint8)(d); \ |
| 0 | 492 } else { \ |
|
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493 dst[0] = (Uint8)d; \ |
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494 dst[1] = (Uint8)(d >> 8); \ |
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495 dst[2] = (Uint8)(d >> 16); \ |
| 0 | 496 } \ |
| 497 break; \ | |
| 498 case 4: \ | |
| 499 *(Uint32 *)dst = d; \ | |
| 500 break; \ | |
| 501 } \ | |
| 502 src += bpp; \ | |
| 503 dst += bpp; \ | |
| 504 } \ | |
| 505 } while(0) | |
| 506 | |
|
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507 #ifdef MMX_ASMBLIT |
| 0 | 508 |
|
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509 #define ALPHA_BLIT32_888_50MMX(to, from, length, bpp, alpha) \ |
|
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510 do { \ |
|
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511 Uint32 *srcp = (Uint32 *)(from); \ |
|
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512 Uint32 *dstp = (Uint32 *)(to); \ |
|
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513 int i = 0x00fefefe; \ |
|
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514 movd_m2r(*(&i), mm4); \ |
|
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515 punpckldq_r2r(mm4, mm4); \ |
|
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516 i = 0x00010101; \ |
|
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517 movd_m2r(*(&i), mm3); \ |
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518 punpckldq_r2r(mm3, mm3); \ |
|
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519 i = (int)(length); \ |
|
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520 if( i & 1 ) { \ |
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521 Uint32 s = *srcp++; \ |
|
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522 Uint32 d = *dstp; \ |
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523 *dstp++ = (((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) \ |
|
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524 + (s & d & 0x00010101); \ |
|
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525 i--; \ |
|
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526 } \ |
|
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527 for(; i > 0; --i) { \ |
|
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528 movq_m2r((*dstp), mm2); /* dst -> mm2 */ \ |
|
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529 movq_r2r(mm2, mm6); /* dst -> mm6 */ \ |
|
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530 movq_m2r((*srcp), mm1); /* src -> mm1 */ \ |
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531 movq_r2r(mm1, mm5); /* src -> mm5 */ \ |
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532 pand_r2r(mm4, mm6); /* dst & 0x00fefefe -> mm6 */ \ |
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533 pand_r2r(mm4, mm5); /* src & 0x00fefefe -> mm5 */ \ |
|
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534 paddd_r2r(mm6, mm5); /* (dst & 0x00fefefe) + (dst & 0x00fefefe) -> mm5 */ \ |
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535 psrld_i2r(1, mm5); \ |
|
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536 pand_r2r(mm1, mm2); /* s & d -> mm2 */ \ |
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537 pand_r2r(mm3, mm2); /* s & d & 0x00010101 -> mm2 */ \ |
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538 paddd_r2r(mm5, mm2); \ |
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539 movq_r2m(mm2, (*dstp)); \ |
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540 dstp += 2; \ |
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541 srcp += 2; \ |
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542 i--; \ |
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543 } \ |
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544 emms(); \ |
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545 } while(0) |
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546 |
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547 #endif |
|
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548 |
| 0 | 549 /* |
| 550 * Special case: 50% alpha (alpha=128) | |
| 551 * This is treated specially because it can be optimized very well, and | |
| 552 * since it is good for many cases of semi-translucency. | |
| 553 * The theory is to do all three components at the same time: | |
| 554 * First zero the lowest bit of each component, which gives us room to | |
| 555 * add them. Then shift right and add the sum of the lowest bits. | |
| 556 */ | |
| 557 #define ALPHA_BLIT32_888_50(to, from, length, bpp, alpha) \ | |
| 558 do { \ | |
| 559 int i; \ | |
| 560 Uint32 *src = (Uint32 *)(from); \ | |
| 561 Uint32 *dst = (Uint32 *)(to); \ | |
| 562 for(i = 0; i < (int)(length); i++) { \ | |
| 563 Uint32 s = *src++; \ | |
| 564 Uint32 d = *dst; \ | |
| 565 *dst++ = (((s & 0x00fefefe) + (d & 0x00fefefe)) >> 1) \ | |
| 566 + (s & d & 0x00010101); \ | |
| 567 } \ | |
| 568 } while(0) | |
| 569 | |
| 570 /* | |
| 571 * For 16bpp, we can actually blend two pixels in parallel, if we take | |
| 572 * care to shift before we add, not after. | |
| 573 */ | |
| 574 | |
| 575 /* helper: blend a single 16 bit pixel at 50% */ | |
| 576 #define BLEND16_50(dst, src, mask) \ | |
| 577 do { \ | |
|
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578 Uint32 s = *src++; \ |
| 0 | 579 Uint32 d = *dst; \ |
|
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580 *dst++ = (Uint16)((((s & mask) + (d & mask)) >> 1) + \ |
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581 (s & d & (~mask & 0xffff))); \ |
| 0 | 582 } while(0) |
| 583 | |
| 584 /* basic 16bpp blender. mask is the pixels to keep when adding. */ | |
| 585 #define ALPHA_BLIT16_50(to, from, length, bpp, alpha, mask) \ | |
| 586 do { \ | |
| 587 unsigned n = (length); \ | |
| 588 Uint16 *src = (Uint16 *)(from); \ | |
| 589 Uint16 *dst = (Uint16 *)(to); \ | |
|
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|
590 if(((uintptr_t)src ^ (uintptr_t)dst) & 3) { \ |
| 0 | 591 /* source and destination not in phase, blit one by one */ \ |
| 592 while(n--) \ | |
| 593 BLEND16_50(dst, src, mask); \ | |
| 594 } else { \ | |
|
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595 if((uintptr_t)src & 3) { \ |
| 0 | 596 /* first odd pixel */ \ |
| 597 BLEND16_50(dst, src, mask); \ | |
| 598 n--; \ | |
| 599 } \ | |
| 600 for(; n > 1; n -= 2) { \ | |
| 601 Uint32 s = *(Uint32 *)src; \ | |
| 602 Uint32 d = *(Uint32 *)dst; \ | |
| 603 *(Uint32 *)dst = ((s & (mask | mask << 16)) >> 1) \ | |
| 604 + ((d & (mask | mask << 16)) >> 1) \ | |
| 605 + (s & d & (~(mask | mask << 16))); \ | |
| 606 src += 2; \ | |
| 607 dst += 2; \ | |
| 608 } \ | |
| 609 if(n) \ | |
| 610 BLEND16_50(dst, src, mask); /* last odd pixel */ \ | |
| 611 } \ | |
| 612 } while(0) | |
| 613 | |
| 614 #define ALPHA_BLIT16_565_50(to, from, length, bpp, alpha) \ | |
| 615 ALPHA_BLIT16_50(to, from, length, bpp, alpha, 0xf7de) | |
| 616 | |
| 617 #define ALPHA_BLIT16_555_50(to, from, length, bpp, alpha) \ | |
| 618 ALPHA_BLIT16_50(to, from, length, bpp, alpha, 0xfbde) | |
| 619 | |
|
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620 #ifdef MMX_ASMBLIT |
| 0 | 621 |
| 622 #define CHOOSE_BLIT(blitter, alpha, fmt) \ | |
| 623 do { \ | |
| 624 if(alpha == 255) { \ | |
| 625 switch(fmt->BytesPerPixel) { \ | |
| 626 case 1: blitter(1, Uint8, OPAQUE_BLIT); break; \ | |
| 627 case 2: blitter(2, Uint8, OPAQUE_BLIT); break; \ | |
| 628 case 3: blitter(3, Uint8, OPAQUE_BLIT); break; \ | |
| 629 case 4: blitter(4, Uint16, OPAQUE_BLIT); break; \ | |
| 630 } \ | |
| 631 } else { \ | |
| 632 switch(fmt->BytesPerPixel) { \ | |
| 633 case 1: \ | |
| 634 /* No 8bpp alpha blitting */ \ | |
| 635 break; \ | |
| 636 \ | |
| 637 case 2: \ | |
| 638 switch(fmt->Rmask | fmt->Gmask | fmt->Bmask) { \ | |
| 639 case 0xffff: \ | |
| 640 if(fmt->Gmask == 0x07e0 \ | |
| 641 || fmt->Rmask == 0x07e0 \ | |
| 642 || fmt->Bmask == 0x07e0) { \ | |
| 643 if(alpha == 128) \ | |
| 644 blitter(2, Uint8, ALPHA_BLIT16_565_50); \ | |
| 645 else { \ | |
|
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646 if(SDL_HasMMX()) \ |
|
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647 blitter(2, Uint8, ALPHA_BLIT16_565MMX); \ |
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648 else \ |
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649 blitter(2, Uint8, ALPHA_BLIT16_565); \ |
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650 } \ |
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651 } else \ |
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652 goto general16; \ |
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653 break; \ |
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654 \ |
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655 case 0x7fff: \ |
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656 if(fmt->Gmask == 0x03e0 \ |
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657 || fmt->Rmask == 0x03e0 \ |
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658 || fmt->Bmask == 0x03e0) { \ |
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659 if(alpha == 128) \ |
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660 blitter(2, Uint8, ALPHA_BLIT16_555_50); \ |
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661 else { \ |
|
739
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Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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662 if(SDL_HasMMX()) \ |
|
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changeset
|
663 blitter(2, Uint8, ALPHA_BLIT16_555MMX); \ |
|
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664 else \ |
|
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665 blitter(2, Uint8, ALPHA_BLIT16_555); \ |
|
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|
666 } \ |
|
5bb080d35049
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diff
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|
667 break; \ |
|
5bb080d35049
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|
668 } \ |
|
5bb080d35049
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|
669 /* fallthrough */ \ |
|
5bb080d35049
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|
670 \ |
|
5bb080d35049
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|
671 default: \ |
|
5bb080d35049
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672 general16: \ |
|
5bb080d35049
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673 blitter(2, Uint8, ALPHA_BLIT_ANY); \ |
|
5bb080d35049
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|
674 } \ |
|
5bb080d35049
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|
675 break; \ |
|
5bb080d35049
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|
676 \ |
|
5bb080d35049
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|
677 case 3: \ |
|
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678 blitter(3, Uint8, ALPHA_BLIT_ANY); \ |
|
5bb080d35049
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|
679 break; \ |
|
5bb080d35049
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|
680 \ |
|
5bb080d35049
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|
681 case 4: \ |
|
5bb080d35049
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682 if((fmt->Rmask | fmt->Gmask | fmt->Bmask) == 0x00ffffff \ |
|
5bb080d35049
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683 && (fmt->Gmask == 0xff00 || fmt->Rmask == 0xff00 \ |
|
5bb080d35049
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diff
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|
684 || fmt->Bmask == 0xff00)) { \ |
|
5bb080d35049
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685 if(alpha == 128) \ |
|
5bb080d35049
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686 { \ |
|
739
22dbf364c017
Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
689
diff
changeset
|
687 if(SDL_HasMMX()) \ |
|
689
5bb080d35049
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688 blitter(4, Uint16, ALPHA_BLIT32_888_50MMX);\ |
|
5bb080d35049
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|
689 else \ |
|
5bb080d35049
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|
690 blitter(4, Uint16, ALPHA_BLIT32_888_50);\ |
|
5bb080d35049
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691 } \ |
|
5bb080d35049
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|
692 else \ |
|
5bb080d35049
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|
693 { \ |
|
739
22dbf364c017
Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
689
diff
changeset
|
694 if(SDL_HasMMX()) \ |
|
689
5bb080d35049
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695 blitter(4, Uint16, ALPHA_BLIT32_888MMX);\ |
|
5bb080d35049
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|
696 else \ |
|
5bb080d35049
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697 blitter(4, Uint16, ALPHA_BLIT32_888); \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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|
698 } \ |
|
5bb080d35049
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|
699 } else \ |
|
5bb080d35049
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|
700 blitter(4, Uint16, ALPHA_BLIT_ANY); \ |
|
5bb080d35049
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|
701 break; \ |
|
5bb080d35049
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|
702 } \ |
|
5bb080d35049
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|
703 } \ |
|
5bb080d35049
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|
704 } while(0) |
|
5bb080d35049
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|
705 |
|
5bb080d35049
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|
706 #else |
|
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707 |
|
689
5bb080d35049
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|
708 #define CHOOSE_BLIT(blitter, alpha, fmt) \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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|
709 do { \ |
|
5bb080d35049
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526
diff
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|
710 if(alpha == 255) { \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff
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|
711 switch(fmt->BytesPerPixel) { \ |
|
5bb080d35049
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Sam Lantinga <slouken@libsdl.org>
parents:
526
diff
changeset
|
712 case 1: blitter(1, Uint8, OPAQUE_BLIT); break; \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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526
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|
713 case 2: blitter(2, Uint8, OPAQUE_BLIT); break; \ |
|
5bb080d35049
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526
diff
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|
714 case 3: blitter(3, Uint8, OPAQUE_BLIT); break; \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
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526
diff
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|
715 case 4: blitter(4, Uint16, OPAQUE_BLIT); break; \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
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|
716 } \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
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|
717 } else { \ |
|
5bb080d35049
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526
diff
changeset
|
718 switch(fmt->BytesPerPixel) { \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
changeset
|
719 case 1: \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents:
526
diff
changeset
|
720 /* No 8bpp alpha blitting */ \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents:
526
diff
changeset
|
721 break; \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents:
526
diff
changeset
|
722 \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents:
526
diff
changeset
|
723 case 2: \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
changeset
|
724 switch(fmt->Rmask | fmt->Gmask | fmt->Bmask) { \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
changeset
|
725 case 0xffff: \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
changeset
|
726 if(fmt->Gmask == 0x07e0 \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents:
526
diff
changeset
|
727 || fmt->Rmask == 0x07e0 \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
changeset
|
728 || fmt->Bmask == 0x07e0) { \ |
|
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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526
diff
changeset
|
729 if(alpha == 128) \ |
|
5bb080d35049
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526
diff
changeset
|
730 blitter(2, Uint8, ALPHA_BLIT16_565_50); \ |
|
5bb080d35049
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diff
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|
731 else { \ |
| 0 | 732 blitter(2, Uint8, ALPHA_BLIT16_565); \ |
| 733 } \ | |
| 734 } else \ | |
| 735 goto general16; \ | |
| 736 break; \ | |
| 737 \ | |
| 738 case 0x7fff: \ | |
| 739 if(fmt->Gmask == 0x03e0 \ | |
| 740 || fmt->Rmask == 0x03e0 \ | |
| 741 || fmt->Bmask == 0x03e0) { \ | |
| 742 if(alpha == 128) \ | |
| 743 blitter(2, Uint8, ALPHA_BLIT16_555_50); \ | |
| 744 else { \ | |
| 745 blitter(2, Uint8, ALPHA_BLIT16_555); \ | |
| 746 } \ | |
| 747 break; \ | |
| 748 } \ | |
| 749 /* fallthrough */ \ | |
| 750 \ | |
| 751 default: \ | |
| 752 general16: \ | |
| 753 blitter(2, Uint8, ALPHA_BLIT_ANY); \ | |
| 754 } \ | |
| 755 break; \ | |
| 756 \ | |
| 757 case 3: \ | |
| 758 blitter(3, Uint8, ALPHA_BLIT_ANY); \ | |
| 759 break; \ | |
| 760 \ | |
| 761 case 4: \ | |
| 762 if((fmt->Rmask | fmt->Gmask | fmt->Bmask) == 0x00ffffff \ | |
| 763 && (fmt->Gmask == 0xff00 || fmt->Rmask == 0xff00 \ | |
| 764 || fmt->Bmask == 0xff00)) { \ | |
| 765 if(alpha == 128) \ | |
| 766 blitter(4, Uint16, ALPHA_BLIT32_888_50); \ | |
| 767 else \ | |
| 768 blitter(4, Uint16, ALPHA_BLIT32_888); \ | |
| 769 } else \ | |
| 770 blitter(4, Uint16, ALPHA_BLIT_ANY); \ | |
| 771 break; \ | |
| 772 } \ | |
| 773 } \ | |
| 774 } while(0) | |
| 775 | |
|
689
5bb080d35049
Date: Tue, 19 Aug 2003 17:57:00 +0200
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diff
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|
776 #endif |
| 0 | 777 |
| 778 /* | |
| 779 * This takes care of the case when the surface is clipped on the left and/or | |
| 780 * right. Top clipping has already been taken care of. | |
| 781 */ | |
|
1895
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diff
changeset
|
782 static void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
783 RLEClipBlit(int w, Uint8 * srcbuf, SDL_Surface * dst, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
784 Uint8 * dstbuf, SDL_Rect * srcrect, unsigned alpha) |
| 0 | 785 { |
| 786 SDL_PixelFormat *fmt = dst->format; | |
| 787 | |
| 788 #define RLECLIPBLIT(bpp, Type, do_blit) \ | |
| 789 do { \ | |
| 790 int linecount = srcrect->h; \ | |
| 791 int ofs = 0; \ | |
| 792 int left = srcrect->x; \ | |
| 793 int right = left + srcrect->w; \ | |
| 794 dstbuf -= left * bpp; \ | |
| 795 for(;;) { \ | |
| 796 int run; \ | |
| 797 ofs += *(Type *)srcbuf; \ | |
| 798 run = ((Type *)srcbuf)[1]; \ | |
| 799 srcbuf += 2 * sizeof(Type); \ | |
| 800 if(run) { \ | |
| 801 /* clip to left and right borders */ \ | |
| 802 if(ofs < right) { \ | |
| 803 int start = 0; \ | |
| 804 int len = run; \ | |
| 805 int startcol; \ | |
| 806 if(left - ofs > 0) { \ | |
| 807 start = left - ofs; \ | |
| 808 len -= start; \ | |
| 809 if(len <= 0) \ | |
| 810 goto nocopy ## bpp ## do_blit; \ | |
| 811 } \ | |
| 812 startcol = ofs + start; \ | |
| 813 if(len > right - startcol) \ | |
| 814 len = right - startcol; \ | |
| 815 do_blit(dstbuf + startcol * bpp, srcbuf + start * bpp, \ | |
| 816 len, bpp, alpha); \ | |
| 817 } \ | |
| 818 nocopy ## bpp ## do_blit: \ | |
| 819 srcbuf += run * bpp; \ | |
| 820 ofs += run; \ | |
| 821 } else if(!ofs) \ | |
| 822 break; \ | |
| 823 if(ofs == w) { \ | |
| 824 ofs = 0; \ | |
| 825 dstbuf += dst->pitch; \ | |
| 826 if(!--linecount) \ | |
| 827 break; \ | |
| 828 } \ | |
| 829 } \ | |
| 830 } while(0) | |
| 831 | |
| 832 CHOOSE_BLIT(RLECLIPBLIT, alpha, fmt); | |
| 833 | |
| 834 #undef RLECLIPBLIT | |
| 835 | |
| 836 } | |
| 837 | |
| 838 | |
| 839 /* blit a colorkeyed RLE surface */ | |
|
1895
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|
840 int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
841 SDL_RLEBlit(SDL_Surface * src, SDL_Rect * srcrect, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
842 SDL_Surface * dst, SDL_Rect * dstrect) |
| 0 | 843 { |
|
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|
844 Uint8 *dstbuf; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
845 Uint8 *srcbuf; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
846 int x, y; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
847 int w = src->w; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
848 unsigned alpha; |
| 0 | 849 |
|
1895
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changeset
|
850 /* Lock the destination if necessary */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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1456
diff
changeset
|
851 if (SDL_MUSTLOCK(dst)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
852 if (SDL_LockSurface(dst) < 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
853 return (-1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
854 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
855 } |
| 0 | 856 |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
857 /* Set up the source and destination pointers */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
858 x = dstrect->x; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
859 y = dstrect->y; |
|
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860 dstbuf = (Uint8 *) dst->pixels |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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861 + y * dst->pitch + x * src->format->BytesPerPixel; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
862 srcbuf = (Uint8 *) src->map->sw_data->aux_data; |
| 0 | 863 |
|
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Sam Lantinga <slouken@libsdl.org>
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changeset
|
864 { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
865 /* skip lines at the top if neccessary */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
866 int vskip = srcrect->y; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
867 int ofs = 0; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
868 if (vskip) { |
| 0 | 869 |
| 870 #define RLESKIP(bpp, Type) \ | |
| 871 for(;;) { \ | |
| 872 int run; \ | |
| 873 ofs += *(Type *)srcbuf; \ | |
| 874 run = ((Type *)srcbuf)[1]; \ | |
| 875 srcbuf += sizeof(Type) * 2; \ | |
| 876 if(run) { \ | |
| 877 srcbuf += run * bpp; \ | |
| 878 ofs += run; \ | |
| 879 } else if(!ofs) \ | |
| 880 goto done; \ | |
| 881 if(ofs == w) { \ | |
| 882 ofs = 0; \ | |
| 883 if(!--vskip) \ | |
| 884 break; \ | |
| 885 } \ | |
| 886 } | |
| 887 | |
|
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|
888 switch (src->format->BytesPerPixel) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
889 case 1: |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
890 RLESKIP(1, Uint8); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
891 break; |
|
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changeset
|
892 case 2: |
|
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|
893 RLESKIP(2, Uint8); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
894 break; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
895 case 3: |
|
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|
896 RLESKIP(3, Uint8); |
|
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|
897 break; |
|
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|
898 case 4: |
|
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changeset
|
899 RLESKIP(4, Uint16); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
900 break; |
|
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|
901 } |
| 0 | 902 |
| 903 #undef RLESKIP | |
| 904 | |
|
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905 } |
|
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Sam Lantinga <slouken@libsdl.org>
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|
906 } |
| 0 | 907 |
|
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|
908 alpha = (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA |
|
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909 ? src->format->alpha : 255; |
|
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910 /* if left or right edge clipping needed, call clip blit */ |
|
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911 if (srcrect->x || srcrect->w != src->w) { |
|
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912 RLEClipBlit(w, srcbuf, dst, dstbuf, srcrect, alpha); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
913 } else { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
914 SDL_PixelFormat *fmt = src->format; |
| 0 | 915 |
| 916 #define RLEBLIT(bpp, Type, do_blit) \ | |
| 917 do { \ | |
| 918 int linecount = srcrect->h; \ | |
| 919 int ofs = 0; \ | |
| 920 for(;;) { \ | |
| 921 unsigned run; \ | |
| 922 ofs += *(Type *)srcbuf; \ | |
| 923 run = ((Type *)srcbuf)[1]; \ | |
| 924 srcbuf += 2 * sizeof(Type); \ | |
| 925 if(run) { \ | |
| 926 do_blit(dstbuf + ofs * bpp, srcbuf, run, bpp, alpha); \ | |
| 927 srcbuf += run * bpp; \ | |
| 928 ofs += run; \ | |
| 929 } else if(!ofs) \ | |
| 930 break; \ | |
| 931 if(ofs == w) { \ | |
| 932 ofs = 0; \ | |
| 933 dstbuf += dst->pitch; \ | |
| 934 if(!--linecount) \ | |
| 935 break; \ | |
| 936 } \ | |
| 937 } \ | |
| 938 } while(0) | |
| 939 | |
|
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Sam Lantinga <slouken@libsdl.org>
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940 CHOOSE_BLIT(RLEBLIT, alpha, fmt); |
| 0 | 941 |
| 942 #undef RLEBLIT | |
|
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943 } |
| 0 | 944 |
|
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|
945 done: |
|
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946 /* Unlock the destination if necessary */ |
|
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|
947 if (SDL_MUSTLOCK(dst)) { |
|
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|
948 SDL_UnlockSurface(dst); |
|
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|
949 } |
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Sam Lantinga <slouken@libsdl.org>
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|
950 return (0); |
| 0 | 951 } |
| 952 | |
| 953 #undef OPAQUE_BLIT | |
| 954 | |
| 955 /* | |
| 956 * Per-pixel blitting macros for translucent pixels: | |
| 957 * These use the same techniques as the per-surface blitting macros | |
| 958 */ | |
| 959 | |
| 960 /* | |
| 961 * For 32bpp pixels, we have made sure the alpha is stored in the top | |
| 962 * 8 bits, so proceed as usual | |
| 963 */ | |
| 964 #define BLIT_TRANSL_888(src, dst) \ | |
| 965 do { \ | |
| 966 Uint32 s = src; \ | |
| 967 Uint32 d = dst; \ | |
| 968 unsigned alpha = s >> 24; \ | |
| 969 Uint32 s1 = s & 0xff00ff; \ | |
| 970 Uint32 d1 = d & 0xff00ff; \ | |
| 971 d1 = (d1 + ((s1 - d1) * alpha >> 8)) & 0xff00ff; \ | |
| 972 s &= 0xff00; \ | |
| 973 d &= 0xff00; \ | |
| 974 d = (d + ((s - d) * alpha >> 8)) & 0xff00; \ | |
| 975 dst = d1 | d; \ | |
| 976 } while(0) | |
| 977 | |
| 978 /* | |
| 979 * For 16bpp pixels, we have stored the 5 most significant alpha bits in | |
| 980 * bits 5-10. As before, we can process all 3 RGB components at the same time. | |
| 981 */ | |
| 982 #define BLIT_TRANSL_565(src, dst) \ | |
| 983 do { \ | |
|
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Update for Visual C++ 6.0
Sam Lantinga <slouken@libsdl.org>
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changeset
|
984 Uint32 s = src; \ |
| 0 | 985 Uint32 d = dst; \ |
| 986 unsigned alpha = (s & 0x3e0) >> 5; \ | |
| 987 s &= 0x07e0f81f; \ | |
| 988 d = (d | d << 16) & 0x07e0f81f; \ | |
| 989 d += (s - d) * alpha >> 5; \ | |
| 990 d &= 0x07e0f81f; \ | |
|
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Update for Visual C++ 6.0
Sam Lantinga <slouken@libsdl.org>
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changeset
|
991 dst = (Uint16)(d | d >> 16); \ |
| 0 | 992 } while(0) |
| 993 | |
| 994 #define BLIT_TRANSL_555(src, dst) \ | |
| 995 do { \ | |
|
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Update for Visual C++ 6.0
Sam Lantinga <slouken@libsdl.org>
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|
996 Uint32 s = src; \ |
| 0 | 997 Uint32 d = dst; \ |
| 998 unsigned alpha = (s & 0x3e0) >> 5; \ | |
| 999 s &= 0x03e07c1f; \ | |
| 1000 d = (d | d << 16) & 0x03e07c1f; \ | |
| 1001 d += (s - d) * alpha >> 5; \ | |
| 1002 d &= 0x03e07c1f; \ | |
|
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Update for Visual C++ 6.0
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diff
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|
1003 dst = (Uint16)(d | d >> 16); \ |
| 0 | 1004 } while(0) |
| 1005 | |
| 1006 /* used to save the destination format in the encoding. Designed to be | |
| 1007 macro-compatible with SDL_PixelFormat but without the unneeded fields */ | |
|
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|
1008 typedef struct |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1009 { |
|
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changeset
|
1010 Uint8 BytesPerPixel; |
|
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changeset
|
1011 Uint8 Rloss; |
|
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Sam Lantinga <slouken@libsdl.org>
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|
1012 Uint8 Gloss; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1013 Uint8 Bloss; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1014 Uint8 Rshift; |
|
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|
1015 Uint8 Gshift; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1016 Uint8 Bshift; |
|
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|
1017 Uint8 Ashift; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1018 Uint32 Rmask; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1019 Uint32 Gmask; |
|
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|
1020 Uint32 Bmask; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1021 Uint32 Amask; |
| 0 | 1022 } RLEDestFormat; |
| 1023 | |
| 1024 /* blit a pixel-alpha RLE surface clipped at the right and/or left edges */ | |
|
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|
1025 static void |
|
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changeset
|
1026 RLEAlphaClipBlit(int w, Uint8 * srcbuf, SDL_Surface * dst, |
|
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|
1027 Uint8 * dstbuf, SDL_Rect * srcrect) |
| 0 | 1028 { |
| 1029 SDL_PixelFormat *df = dst->format; | |
| 1030 /* | |
| 1031 * clipped blitter: Ptype is the destination pixel type, | |
| 1032 * Ctype the translucent count type, and do_blend the macro | |
| 1033 * to blend one pixel. | |
| 1034 */ | |
| 1035 #define RLEALPHACLIPBLIT(Ptype, Ctype, do_blend) \ | |
| 1036 do { \ | |
| 1037 int linecount = srcrect->h; \ | |
| 1038 int left = srcrect->x; \ | |
| 1039 int right = left + srcrect->w; \ | |
| 1040 dstbuf -= left * sizeof(Ptype); \ | |
| 1041 do { \ | |
| 1042 int ofs = 0; \ | |
| 1043 /* blit opaque pixels on one line */ \ | |
| 1044 do { \ | |
| 1045 unsigned run; \ | |
| 1046 ofs += ((Ctype *)srcbuf)[0]; \ | |
| 1047 run = ((Ctype *)srcbuf)[1]; \ | |
| 1048 srcbuf += 2 * sizeof(Ctype); \ | |
| 1049 if(run) { \ | |
| 1050 /* clip to left and right borders */ \ | |
| 1051 int cofs = ofs; \ | |
| 1052 int crun = run; \ | |
| 1053 if(left - cofs > 0) { \ | |
| 1054 crun -= left - cofs; \ | |
| 1055 cofs = left; \ | |
| 1056 } \ | |
| 1057 if(crun > right - cofs) \ | |
| 1058 crun = right - cofs; \ | |
| 1059 if(crun > 0) \ | |
|
1
cf2af46e9e2a
Changes since SDL 1.2.0 release
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parents:
0
diff
changeset
|
1060 PIXEL_COPY(dstbuf + cofs * sizeof(Ptype), \ |
| 0 | 1061 srcbuf + (cofs - ofs) * sizeof(Ptype), \ |
|
1
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Changes since SDL 1.2.0 release
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0
diff
changeset
|
1062 (unsigned)crun, sizeof(Ptype)); \ |
| 0 | 1063 srcbuf += run * sizeof(Ptype); \ |
| 1064 ofs += run; \ | |
| 1065 } else if(!ofs) \ | |
| 1066 return; \ | |
| 1067 } while(ofs < w); \ | |
| 1068 /* skip padding if necessary */ \ | |
| 1069 if(sizeof(Ptype) == 2) \ | |
|
1456
84de7511f79f
Fixed a bunch of 64-bit compatibility problems
Sam Lantinga <slouken@libsdl.org>
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1428
diff
changeset
|
1070 srcbuf += (uintptr_t)srcbuf & 2; \ |
| 0 | 1071 /* blit translucent pixels on the same line */ \ |
| 1072 ofs = 0; \ | |
| 1073 do { \ | |
| 1074 unsigned run; \ | |
| 1075 ofs += ((Uint16 *)srcbuf)[0]; \ | |
| 1076 run = ((Uint16 *)srcbuf)[1]; \ | |
| 1077 srcbuf += 4; \ | |
| 1078 if(run) { \ | |
| 1079 /* clip to left and right borders */ \ | |
| 1080 int cofs = ofs; \ | |
| 1081 int crun = run; \ | |
| 1082 if(left - cofs > 0) { \ | |
| 1083 crun -= left - cofs; \ | |
| 1084 cofs = left; \ | |
| 1085 } \ | |
| 1086 if(crun > right - cofs) \ | |
| 1087 crun = right - cofs; \ | |
| 1088 if(crun > 0) { \ | |
| 1089 Ptype *dst = (Ptype *)dstbuf + cofs; \ | |
| 1090 Uint32 *src = (Uint32 *)srcbuf + (cofs - ofs); \ | |
| 1091 int i; \ | |
| 1092 for(i = 0; i < crun; i++) \ | |
| 1093 do_blend(src[i], dst[i]); \ | |
| 1094 } \ | |
| 1095 srcbuf += run * 4; \ | |
| 1096 ofs += run; \ | |
| 1097 } \ | |
| 1098 } while(ofs < w); \ | |
| 1099 dstbuf += dst->pitch; \ | |
| 1100 } while(--linecount); \ | |
| 1101 } while(0) | |
| 1102 | |
|
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|
1103 switch (df->BytesPerPixel) { |
| 0 | 1104 case 2: |
|
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|
1105 if (df->Gmask == 0x07e0 || df->Rmask == 0x07e0 || df->Bmask == 0x07e0) |
|
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|
1106 RLEALPHACLIPBLIT(Uint16, Uint8, BLIT_TRANSL_565); |
|
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|
1107 else |
|
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changeset
|
1108 RLEALPHACLIPBLIT(Uint16, Uint8, BLIT_TRANSL_555); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1109 break; |
| 0 | 1110 case 4: |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1111 RLEALPHACLIPBLIT(Uint32, Uint16, BLIT_TRANSL_888); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1112 break; |
| 0 | 1113 } |
| 1114 } | |
| 1115 | |
| 1116 /* blit a pixel-alpha RLE surface */ | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1117 int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1118 SDL_RLEAlphaBlit(SDL_Surface * src, SDL_Rect * srcrect, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1119 SDL_Surface * dst, SDL_Rect * dstrect) |
| 0 | 1120 { |
| 1121 int x, y; | |
| 1122 int w = src->w; | |
| 1123 Uint8 *srcbuf, *dstbuf; | |
| 1124 SDL_PixelFormat *df = dst->format; | |
| 1125 | |
| 1126 /* Lock the destination if necessary */ | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1127 if (SDL_MUSTLOCK(dst)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1128 if (SDL_LockSurface(dst) < 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1129 return -1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1130 } |
| 0 | 1131 } |
| 1132 | |
| 1133 x = dstrect->x; | |
| 1134 y = dstrect->y; | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1135 dstbuf = (Uint8 *) dst->pixels + y * dst->pitch + x * df->BytesPerPixel; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1136 srcbuf = (Uint8 *) src->map->sw_data->aux_data + sizeof(RLEDestFormat); |
| 0 | 1137 |
| 1138 { | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1139 /* skip lines at the top if necessary */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1140 int vskip = srcrect->y; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1141 if (vskip) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1142 int ofs; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1143 if (df->BytesPerPixel == 2) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1144 /* the 16/32 interleaved format */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1145 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1146 /* skip opaque line */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1147 ofs = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1148 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1149 int run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1150 ofs += srcbuf[0]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1151 run = srcbuf[1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1152 srcbuf += 2; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1153 if (run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1154 srcbuf += 2 * run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1155 ofs += run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1156 } else if (!ofs) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1157 goto done; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1158 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1159 while (ofs < w); |
| 0 | 1160 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1161 /* skip padding */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1162 srcbuf += (uintptr_t) srcbuf & 2; |
| 0 | 1163 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1164 /* skip translucent line */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1165 ofs = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1166 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1167 int run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1168 ofs += ((Uint16 *) srcbuf)[0]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1169 run = ((Uint16 *) srcbuf)[1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1170 srcbuf += 4 * (run + 1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1171 ofs += run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1172 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1173 while (ofs < w); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1174 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1175 while (--vskip); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1176 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1177 /* the 32/32 interleaved format */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1178 vskip <<= 1; /* opaque and translucent have same format */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1179 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1180 ofs = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1181 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1182 int run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1183 ofs += ((Uint16 *) srcbuf)[0]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1184 run = ((Uint16 *) srcbuf)[1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1185 srcbuf += 4; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1186 if (run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1187 srcbuf += 4 * run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1188 ofs += run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1189 } else if (!ofs) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1190 goto done; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1191 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1192 while (ofs < w); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1193 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1194 while (--vskip); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1195 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1196 } |
| 0 | 1197 } |
| 1198 | |
| 1199 /* if left or right edge clipping needed, call clip blit */ | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1200 if (srcrect->x || srcrect->w != src->w) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1201 RLEAlphaClipBlit(w, srcbuf, dst, dstbuf, srcrect); |
| 0 | 1202 } else { |
| 1203 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1204 /* |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1205 * non-clipped blitter. Ptype is the destination pixel type, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1206 * Ctype the translucent count type, and do_blend the |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1207 * macro to blend one pixel. |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1208 */ |
| 0 | 1209 #define RLEALPHABLIT(Ptype, Ctype, do_blend) \ |
| 1210 do { \ | |
| 1211 int linecount = srcrect->h; \ | |
| 1212 do { \ | |
| 1213 int ofs = 0; \ | |
| 1214 /* blit opaque pixels on one line */ \ | |
| 1215 do { \ | |
| 1216 unsigned run; \ | |
| 1217 ofs += ((Ctype *)srcbuf)[0]; \ | |
| 1218 run = ((Ctype *)srcbuf)[1]; \ | |
| 1219 srcbuf += 2 * sizeof(Ctype); \ | |
| 1220 if(run) { \ | |
|
1
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
1221 PIXEL_COPY(dstbuf + ofs * sizeof(Ptype), srcbuf, \ |
|
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
1222 run, sizeof(Ptype)); \ |
| 0 | 1223 srcbuf += run * sizeof(Ptype); \ |
| 1224 ofs += run; \ | |
| 1225 } else if(!ofs) \ | |
| 1226 goto done; \ | |
| 1227 } while(ofs < w); \ | |
| 1228 /* skip padding if necessary */ \ | |
| 1229 if(sizeof(Ptype) == 2) \ | |
|
1456
84de7511f79f
Fixed a bunch of 64-bit compatibility problems
Sam Lantinga <slouken@libsdl.org>
parents:
1428
diff
changeset
|
1230 srcbuf += (uintptr_t)srcbuf & 2; \ |
| 0 | 1231 /* blit translucent pixels on the same line */ \ |
| 1232 ofs = 0; \ | |
| 1233 do { \ | |
| 1234 unsigned run; \ | |
| 1235 ofs += ((Uint16 *)srcbuf)[0]; \ | |
| 1236 run = ((Uint16 *)srcbuf)[1]; \ | |
| 1237 srcbuf += 4; \ | |
| 1238 if(run) { \ | |
| 1239 Ptype *dst = (Ptype *)dstbuf + ofs; \ | |
| 1240 unsigned i; \ | |
| 1241 for(i = 0; i < run; i++) { \ | |
| 1242 Uint32 src = *(Uint32 *)srcbuf; \ | |
| 1243 do_blend(src, *dst); \ | |
| 1244 srcbuf += 4; \ | |
| 1245 dst++; \ | |
| 1246 } \ | |
| 1247 ofs += run; \ | |
| 1248 } \ | |
| 1249 } while(ofs < w); \ | |
| 1250 dstbuf += dst->pitch; \ | |
| 1251 } while(--linecount); \ | |
| 1252 } while(0) | |
| 1253 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1254 switch (df->BytesPerPixel) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1255 case 2: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1256 if (df->Gmask == 0x07e0 || df->Rmask == 0x07e0 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1257 || df->Bmask == 0x07e0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1258 RLEALPHABLIT(Uint16, Uint8, BLIT_TRANSL_565); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1259 else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1260 RLEALPHABLIT(Uint16, Uint8, BLIT_TRANSL_555); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1261 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1262 case 4: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1263 RLEALPHABLIT(Uint32, Uint16, BLIT_TRANSL_888); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1264 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1265 } |
| 0 | 1266 } |
| 1267 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1268 done: |
| 0 | 1269 /* Unlock the destination if necessary */ |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
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|
1270 if (SDL_MUSTLOCK(dst)) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1271 SDL_UnlockSurface(dst); |
| 0 | 1272 } |
| 1273 return 0; | |
| 1274 } | |
| 1275 | |
| 1276 /* | |
| 1277 * Auxiliary functions: | |
| 1278 * The encoding functions take 32bpp rgb + a, and | |
| 1279 * return the number of bytes copied to the destination. | |
| 1280 * The decoding functions copy to 32bpp rgb + a, and | |
| 1281 * return the number of bytes copied from the source. | |
| 1282 * These are only used in the encoder and un-RLE code and are therefore not | |
| 1283 * highly optimised. | |
| 1284 */ | |
| 1285 | |
| 1286 /* encode 32bpp rgb + a into 16bpp rgb, losing alpha */ | |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1287 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1288 copy_opaque_16(void *dst, Uint32 * src, int n, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1289 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
| 0 | 1290 { |
| 1291 int i; | |
| 1292 Uint16 *d = dst; | |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1293 for (i = 0; i < n; i++) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
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|
1294 unsigned r, g, b; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1295 RGB_FROM_PIXEL(*src, sfmt, r, g, b); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1296 PIXEL_FROM_RGB(*d, dfmt, r, g, b); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1297 src++; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1298 d++; |
| 0 | 1299 } |
| 1300 return n * 2; | |
| 1301 } | |
| 1302 | |
| 1303 /* decode opaque pixels from 16bpp to 32bpp rgb + a */ | |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1304 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1305 uncopy_opaque_16(Uint32 * dst, void *src, int n, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1306 RLEDestFormat * sfmt, SDL_PixelFormat * dfmt) |
| 0 | 1307 { |
| 1308 int i; | |
| 1309 Uint16 *s = src; | |
| 1310 unsigned alpha = dfmt->Amask ? 255 : 0; | |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1311 for (i = 0; i < n; i++) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1312 unsigned r, g, b; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1456
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|
1313 RGB_FROM_PIXEL(*s, sfmt, r, g, b); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1314 PIXEL_FROM_RGBA(*dst, dfmt, r, g, b, alpha); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1315 s++; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1316 dst++; |
| 0 | 1317 } |
| 1318 return n * 2; | |
| 1319 } | |
| 1320 | |
| 1321 | |
| 1322 | |
| 1323 /* encode 32bpp rgb + a into 32bpp G0RAB format for blitting into 565 */ | |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1324 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1325 copy_transl_565(void *dst, Uint32 * src, int n, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1326 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
| 0 | 1327 { |
| 1328 int i; | |
| 1329 Uint32 *d = dst; | |
|
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Sam Lantinga <slouken@libsdl.org>
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|
1330 for (i = 0; i < n; i++) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1331 unsigned r, g, b, a; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1332 Uint16 pix; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1333 RGBA_FROM_8888(*src, sfmt, r, g, b, a); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1334 PIXEL_FROM_RGB(pix, dfmt, r, g, b); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1335 *d = ((pix & 0x7e0) << 16) | (pix & 0xf81f) | ((a << 2) & 0x7e0); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1336 src++; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1337 d++; |
| 0 | 1338 } |
| 1339 return n * 4; | |
| 1340 } | |
| 1341 | |
| 1342 /* encode 32bpp rgb + a into 32bpp G0RAB format for blitting into 555 */ | |
|
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|
1343 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1344 copy_transl_555(void *dst, Uint32 * src, int n, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1345 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
| 0 | 1346 { |
| 1347 int i; | |
| 1348 Uint32 *d = dst; | |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1349 for (i = 0; i < n; i++) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1350 unsigned r, g, b, a; |
|
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|
1351 Uint16 pix; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1352 RGBA_FROM_8888(*src, sfmt, r, g, b, a); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1353 PIXEL_FROM_RGB(pix, dfmt, r, g, b); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1354 *d = ((pix & 0x3e0) << 16) | (pix & 0xfc1f) | ((a << 2) & 0x3e0); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1355 src++; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1356 d++; |
| 0 | 1357 } |
| 1358 return n * 4; | |
| 1359 } | |
| 1360 | |
| 1361 /* decode translucent pixels from 32bpp GORAB to 32bpp rgb + a */ | |
|
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|
1362 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1363 uncopy_transl_16(Uint32 * dst, void *src, int n, |
|
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Sam Lantinga <slouken@libsdl.org>
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1456
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|
1364 RLEDestFormat * sfmt, SDL_PixelFormat * dfmt) |
| 0 | 1365 { |
| 1366 int i; | |
| 1367 Uint32 *s = src; | |
|
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|
1368 for (i = 0; i < n; i++) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1369 unsigned r, g, b, a; |
|
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Sam Lantinga <slouken@libsdl.org>
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|
1370 Uint32 pix = *s++; |
|
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Sam Lantinga <slouken@libsdl.org>
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|
1371 a = (pix & 0x3e0) >> 2; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1372 pix = (pix & ~0x3e0) | pix >> 16; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1373 RGB_FROM_PIXEL(pix, sfmt, r, g, b); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1456
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|
1374 PIXEL_FROM_RGBA(*dst, dfmt, r, g, b, a); |
|
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Sam Lantinga <slouken@libsdl.org>
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changeset
|
1375 dst++; |
| 0 | 1376 } |
| 1377 return n * 4; | |
| 1378 } | |
| 1379 | |
| 1380 /* encode 32bpp rgba into 32bpp rgba, keeping alpha (dual purpose) */ | |
|
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|
1381 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
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|
1382 copy_32(void *dst, Uint32 * src, int n, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1383 SDL_PixelFormat * sfmt, SDL_PixelFormat * dfmt) |
| 0 | 1384 { |
| 1385 int i; | |
| 1386 Uint32 *d = dst; | |
|
1895
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Sam Lantinga <slouken@libsdl.org>
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|
1387 for (i = 0; i < n; i++) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1388 unsigned r, g, b, a; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1389 Uint32 pixel; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1456
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changeset
|
1390 RGBA_FROM_8888(*src, sfmt, r, g, b, a); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1391 PIXEL_FROM_RGB(pixel, dfmt, r, g, b); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1392 *d++ = pixel | a << 24; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1393 src++; |
| 0 | 1394 } |
| 1395 return n * 4; | |
| 1396 } | |
| 1397 | |
| 1398 /* decode 32bpp rgba into 32bpp rgba, keeping alpha (dual purpose) */ | |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1399 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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|
1400 uncopy_32(Uint32 * dst, void *src, int n, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1401 RLEDestFormat * sfmt, SDL_PixelFormat * dfmt) |
| 0 | 1402 { |
| 1403 int i; | |
| 1404 Uint32 *s = src; | |
|
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|
1405 for (i = 0; i < n; i++) { |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1406 unsigned r, g, b, a; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1407 Uint32 pixel = *s++; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1408 RGB_FROM_PIXEL(pixel, sfmt, r, g, b); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1409 a = pixel >> 24; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1410 PIXEL_FROM_RGBA(*dst, dfmt, r, g, b, a); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1411 dst++; |
| 0 | 1412 } |
| 1413 return n * 4; | |
| 1414 } | |
| 1415 | |
| 1416 #define ISOPAQUE(pixel, fmt) ((((pixel) & fmt->Amask) >> fmt->Ashift) == 255) | |
| 1417 | |
| 1418 #define ISTRANSL(pixel, fmt) \ | |
| 1419 ((unsigned)((((pixel) & fmt->Amask) >> fmt->Ashift) - 1U) < 254U) | |
| 1420 | |
| 1421 /* convert surface to be quickly alpha-blittable onto dest, if possible */ | |
|
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|
1422 static int |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1423 RLEAlphaSurface(SDL_Surface * surface) |
| 0 | 1424 { |
| 1425 SDL_Surface *dest; | |
| 1426 SDL_PixelFormat *df; | |
| 1427 int maxsize = 0; | |
| 1428 int max_opaque_run; | |
| 1429 int max_transl_run = 65535; | |
| 1430 unsigned masksum; | |
| 1431 Uint8 *rlebuf, *dst; | |
|
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diff
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|
1432 int (*copy_opaque) (void *, Uint32 *, int, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1433 SDL_PixelFormat *, SDL_PixelFormat *); |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1434 int (*copy_transl) (void *, Uint32 *, int, |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1435 SDL_PixelFormat *, SDL_PixelFormat *); |
| 0 | 1436 |
| 1437 dest = surface->map->dst; | |
|
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changeset
|
1438 if (!dest) |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1439 return -1; |
| 0 | 1440 df = dest->format; |
|
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1441 if (surface->format->BitsPerPixel != 32) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1442 return -1; /* only 32bpp source supported */ |
| 0 | 1443 |
| 1444 /* find out whether the destination is one we support, | |
| 1445 and determine the max size of the encoded result */ | |
| 1446 masksum = df->Rmask | df->Gmask | df->Bmask; | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1447 switch (df->BytesPerPixel) { |
| 0 | 1448 case 2: |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1449 /* 16bpp: only support 565 and 555 formats */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1450 switch (masksum) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1451 case 0xffff: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1452 if (df->Gmask == 0x07e0 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1453 || df->Rmask == 0x07e0 || df->Bmask == 0x07e0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1454 copy_opaque = copy_opaque_16; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1455 copy_transl = copy_transl_565; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1456 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1457 return -1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1458 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1459 case 0x7fff: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1460 if (df->Gmask == 0x03e0 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1461 || df->Rmask == 0x03e0 || df->Bmask == 0x03e0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1462 copy_opaque = copy_opaque_16; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1463 copy_transl = copy_transl_555; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1464 } else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1465 return -1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1466 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1467 default: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1468 return -1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1469 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1470 max_opaque_run = 255; /* runs stored as bytes */ |
| 0 | 1471 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1472 /* worst case is alternating opaque and translucent pixels, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1473 with room for alignment padding between lines */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1474 maxsize = surface->h * (2 + (4 + 2) * (surface->w + 1)) + 2; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1475 break; |
| 0 | 1476 case 4: |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1477 if (masksum != 0x00ffffff) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1478 return -1; /* requires unused high byte */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1479 copy_opaque = copy_32; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1480 copy_transl = copy_32; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1481 max_opaque_run = 255; /* runs stored as short ints */ |
| 0 | 1482 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1483 /* worst case is alternating opaque and translucent pixels */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1484 maxsize = surface->h * 2 * 4 * (surface->w + 1) + 4; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1485 break; |
| 0 | 1486 default: |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1487 return -1; /* anything else unsupported right now */ |
| 0 | 1488 } |
| 1489 | |
| 1490 maxsize += sizeof(RLEDestFormat); | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1491 rlebuf = (Uint8 *) SDL_malloc(maxsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1492 if (!rlebuf) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1493 SDL_OutOfMemory(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1494 return -1; |
| 0 | 1495 } |
| 1496 { | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1497 /* save the destination format so we can undo the encoding later */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1498 RLEDestFormat *r = (RLEDestFormat *) rlebuf; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1499 r->BytesPerPixel = df->BytesPerPixel; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1500 r->Rloss = df->Rloss; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1501 r->Gloss = df->Gloss; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1502 r->Bloss = df->Bloss; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1503 r->Rshift = df->Rshift; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1504 r->Gshift = df->Gshift; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1505 r->Bshift = df->Bshift; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1506 r->Ashift = df->Ashift; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1507 r->Rmask = df->Rmask; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1508 r->Gmask = df->Gmask; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1509 r->Bmask = df->Bmask; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1510 r->Amask = df->Amask; |
| 0 | 1511 } |
| 1512 dst = rlebuf + sizeof(RLEDestFormat); | |
| 1513 | |
| 1514 /* Do the actual encoding */ | |
| 1515 { | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1516 int x, y; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1517 int h = surface->h, w = surface->w; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1518 SDL_PixelFormat *sf = surface->format; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1519 Uint32 *src = (Uint32 *) surface->pixels; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1520 Uint8 *lastline = dst; /* end of last non-blank line */ |
| 0 | 1521 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1522 /* opaque counts are 8 or 16 bits, depending on target depth */ |
| 0 | 1523 #define ADD_OPAQUE_COUNTS(n, m) \ |
| 1524 if(df->BytesPerPixel == 4) { \ | |
| 1525 ((Uint16 *)dst)[0] = n; \ | |
| 1526 ((Uint16 *)dst)[1] = m; \ | |
| 1527 dst += 4; \ | |
| 1528 } else { \ | |
| 1529 dst[0] = n; \ | |
| 1530 dst[1] = m; \ | |
| 1531 dst += 2; \ | |
| 1532 } | |
| 1533 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1534 /* translucent counts are always 16 bit */ |
| 0 | 1535 #define ADD_TRANSL_COUNTS(n, m) \ |
| 1536 (((Uint16 *)dst)[0] = n, ((Uint16 *)dst)[1] = m, dst += 4) | |
| 1537 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1538 for (y = 0; y < h; y++) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1539 int runstart, skipstart; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1540 int blankline = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1541 /* First encode all opaque pixels of a scan line */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1542 x = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1543 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1544 int run, skip, len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1545 skipstart = x; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1546 while (x < w && !ISOPAQUE(src[x], sf)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1547 x++; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1548 runstart = x; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1549 while (x < w && ISOPAQUE(src[x], sf)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1550 x++; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1551 skip = runstart - skipstart; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1552 if (skip == w) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1553 blankline = 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1554 run = x - runstart; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1555 while (skip > max_opaque_run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1556 ADD_OPAQUE_COUNTS(max_opaque_run, 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1557 skip -= max_opaque_run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1558 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1559 len = MIN(run, max_opaque_run); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1560 ADD_OPAQUE_COUNTS(skip, len); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1561 dst += copy_opaque(dst, src + runstart, len, sf, df); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1562 runstart += len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1563 run -= len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1564 while (run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1565 len = MIN(run, max_opaque_run); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1566 ADD_OPAQUE_COUNTS(0, len); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1567 dst += copy_opaque(dst, src + runstart, len, sf, df); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1568 runstart += len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1569 run -= len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1570 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1571 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1572 while (x < w); |
| 0 | 1573 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1574 /* Make sure the next output address is 32-bit aligned */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1575 dst += (uintptr_t) dst & 2; |
| 0 | 1576 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1577 /* Next, encode all translucent pixels of the same scan line */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1578 x = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1579 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1580 int run, skip, len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1581 skipstart = x; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1582 while (x < w && !ISTRANSL(src[x], sf)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1583 x++; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1584 runstart = x; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1585 while (x < w && ISTRANSL(src[x], sf)) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1586 x++; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1587 skip = runstart - skipstart; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1588 blankline &= (skip == w); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1589 run = x - runstart; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1590 while (skip > max_transl_run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1591 ADD_TRANSL_COUNTS(max_transl_run, 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1592 skip -= max_transl_run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1593 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1594 len = MIN(run, max_transl_run); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1595 ADD_TRANSL_COUNTS(skip, len); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1596 dst += copy_transl(dst, src + runstart, len, sf, df); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1597 runstart += len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1598 run -= len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1599 while (run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1600 len = MIN(run, max_transl_run); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1601 ADD_TRANSL_COUNTS(0, len); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1602 dst += copy_transl(dst, src + runstart, len, sf, df); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1603 runstart += len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1604 run -= len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1605 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1606 if (!blankline) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1607 lastline = dst; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1608 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1609 while (x < w); |
| 0 | 1610 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1611 src += surface->pitch >> 2; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1612 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1613 dst = lastline; /* back up past trailing blank lines */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1614 ADD_OPAQUE_COUNTS(0, 0); |
| 0 | 1615 } |
| 1616 | |
| 1617 #undef ADD_OPAQUE_COUNTS | |
| 1618 #undef ADD_TRANSL_COUNTS | |
| 1619 | |
| 1620 /* Now that we have it encoded, release the original pixels */ | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1621 if (!(surface->flags & SDL_PREALLOC) && !(surface->flags & SDL_HWSURFACE)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1622 SDL_free(surface->pixels); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1623 surface->pixels = NULL; |
| 0 | 1624 } |
| 1625 | |
| 1626 /* realloc the buffer to release unused memory */ | |
| 1627 { | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1628 Uint8 *p = SDL_realloc(rlebuf, dst - rlebuf); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1629 if (!p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1630 p = rlebuf; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1631 surface->map->sw_data->aux_data = p; |
| 0 | 1632 } |
| 1633 | |
| 1634 return 0; | |
| 1635 } | |
| 1636 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1637 static Uint32 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1638 getpix_8(Uint8 * srcbuf) |
| 0 | 1639 { |
| 1640 return *srcbuf; | |
| 1641 } | |
| 1642 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1643 static Uint32 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1644 getpix_16(Uint8 * srcbuf) |
| 0 | 1645 { |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1646 return *(Uint16 *) srcbuf; |
| 0 | 1647 } |
| 1648 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1649 static Uint32 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1650 getpix_24(Uint8 * srcbuf) |
| 0 | 1651 { |
|
1155
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1652 #if SDL_BYTEORDER == SDL_LIL_ENDIAN |
|
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1653 return srcbuf[0] + (srcbuf[1] << 8) + (srcbuf[2] << 16); |
|
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1654 #else |
|
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1655 return (srcbuf[0] << 16) + (srcbuf[1] << 8) + srcbuf[2]; |
|
91569ec25acd
Fixed some compiler warnings about "unreachable code" on Watcom C.
Ryan C. Gordon <icculus@icculus.org>
parents:
944
diff
changeset
|
1656 #endif |
| 0 | 1657 } |
| 1658 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1659 static Uint32 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1660 getpix_32(Uint8 * srcbuf) |
| 0 | 1661 { |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1662 return *(Uint32 *) srcbuf; |
| 0 | 1663 } |
| 1664 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1665 typedef Uint32(*getpix_func) (Uint8 *); |
| 0 | 1666 |
| 1667 static getpix_func getpixes[4] = { | |
| 1668 getpix_8, getpix_16, getpix_24, getpix_32 | |
| 1669 }; | |
| 1670 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1671 static int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1672 RLEColorkeySurface(SDL_Surface * surface) |
| 0 | 1673 { |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1674 Uint8 *rlebuf, *dst; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1675 int maxn; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1676 int y; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1677 Uint8 *srcbuf, *curbuf, *lastline; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1678 int maxsize = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1679 int skip, run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1680 int bpp = surface->format->BytesPerPixel; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1681 getpix_func getpix; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1682 Uint32 ckey, rgbmask; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1683 int w, h; |
| 0 | 1684 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1685 /* calculate the worst case size for the compressed surface */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1686 switch (bpp) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1687 case 1: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1688 /* worst case is alternating opaque and transparent pixels, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1689 starting with an opaque pixel */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1690 maxsize = surface->h * 3 * (surface->w / 2 + 1) + 2; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1691 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1692 case 2: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1693 case 3: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1694 /* worst case is solid runs, at most 255 pixels wide */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1695 maxsize = surface->h * (2 * (surface->w / 255 + 1) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1696 + surface->w * bpp) + 2; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1697 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1698 case 4: |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1699 /* worst case is solid runs, at most 65535 pixels wide */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1700 maxsize = surface->h * (4 * (surface->w / 65535 + 1) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1701 + surface->w * 4) + 4; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1702 break; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1703 } |
| 0 | 1704 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1705 rlebuf = (Uint8 *) SDL_malloc(maxsize); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1706 if (rlebuf == NULL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1707 SDL_OutOfMemory(); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1708 return (-1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1709 } |
| 0 | 1710 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1711 /* Set up the conversion */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1712 srcbuf = (Uint8 *) surface->pixels; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1713 curbuf = srcbuf; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1714 maxn = bpp == 4 ? 65535 : 255; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1715 skip = run = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1716 dst = rlebuf; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1717 rgbmask = ~surface->format->Amask; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1718 ckey = surface->format->colorkey & rgbmask; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1719 lastline = dst; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1720 getpix = getpixes[bpp - 1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1721 w = surface->w; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1722 h = surface->h; |
| 0 | 1723 |
| 1724 #define ADD_COUNTS(n, m) \ | |
| 1725 if(bpp == 4) { \ | |
| 1726 ((Uint16 *)dst)[0] = n; \ | |
| 1727 ((Uint16 *)dst)[1] = m; \ | |
| 1728 dst += 4; \ | |
| 1729 } else { \ | |
| 1730 dst[0] = n; \ | |
| 1731 dst[1] = m; \ | |
| 1732 dst += 2; \ | |
| 1733 } | |
| 1734 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1735 for (y = 0; y < h; y++) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1736 int x = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1737 int blankline = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1738 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1739 int run, skip, len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1740 int runstart; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1741 int skipstart = x; |
| 0 | 1742 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1743 /* find run of transparent, then opaque pixels */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1744 while (x < w && (getpix(srcbuf + x * bpp) & rgbmask) == ckey) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1745 x++; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1746 runstart = x; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1747 while (x < w && (getpix(srcbuf + x * bpp) & rgbmask) != ckey) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1748 x++; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1749 skip = runstart - skipstart; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1750 if (skip == w) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1751 blankline = 1; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1752 run = x - runstart; |
| 0 | 1753 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1754 /* encode segment */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1755 while (skip > maxn) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1756 ADD_COUNTS(maxn, 0); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1757 skip -= maxn; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1758 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1759 len = MIN(run, maxn); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1760 ADD_COUNTS(skip, len); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1761 SDL_memcpy(dst, srcbuf + runstart * bpp, len * bpp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1762 dst += len * bpp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1763 run -= len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1764 runstart += len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1765 while (run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1766 len = MIN(run, maxn); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1767 ADD_COUNTS(0, len); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1768 SDL_memcpy(dst, srcbuf + runstart * bpp, len * bpp); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1769 dst += len * bpp; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1770 runstart += len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1771 run -= len; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1772 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1773 if (!blankline) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1774 lastline = dst; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1775 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1776 while (x < w); |
| 0 | 1777 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1778 srcbuf += surface->pitch; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1779 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1780 dst = lastline; /* back up bast trailing blank lines */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1781 ADD_COUNTS(0, 0); |
| 0 | 1782 |
| 1783 #undef ADD_COUNTS | |
| 1784 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1785 /* Now that we have it encoded, release the original pixels */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1786 if (!(surface->flags & SDL_PREALLOC) && !(surface->flags & SDL_HWSURFACE)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1787 SDL_free(surface->pixels); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1788 surface->pixels = NULL; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1789 } |
| 0 | 1790 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1791 /* realloc the buffer to release unused memory */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1792 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1793 /* If realloc returns NULL, the original block is left intact */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1794 Uint8 *p = SDL_realloc(rlebuf, dst - rlebuf); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1795 if (!p) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1796 p = rlebuf; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1797 surface->map->sw_data->aux_data = p; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1798 } |
| 0 | 1799 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1800 return (0); |
| 0 | 1801 } |
| 1802 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1803 int |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1804 SDL_RLESurface(SDL_Surface * surface) |
| 0 | 1805 { |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1806 int retcode; |
| 0 | 1807 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1808 /* Clear any previous RLE conversion */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1809 if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1810 SDL_UnRLESurface(surface, 1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1811 } |
| 0 | 1812 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1813 /* We don't support RLE encoding of bitmaps */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1814 if (surface->format->BitsPerPixel < 8) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1815 return (-1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1816 } |
| 0 | 1817 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1818 /* Lock the surface if it's in hardware */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1819 if (SDL_MUSTLOCK(surface)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1820 if (SDL_LockSurface(surface) < 0) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1821 return (-1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1822 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1823 } |
| 0 | 1824 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1825 /* Encode */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1826 if ((surface->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1827 retcode = RLEColorkeySurface(surface); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1828 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1829 if ((surface->flags & SDL_SRCALPHA) == SDL_SRCALPHA |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1830 && surface->format->Amask != 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1831 retcode = RLEAlphaSurface(surface); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1832 else |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1833 retcode = -1; /* no RLE for per-surface alpha sans ckey */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1834 } |
| 0 | 1835 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1836 /* Unlock the surface if it's in hardware */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1837 if (SDL_MUSTLOCK(surface)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1838 SDL_UnlockSurface(surface); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1839 } |
| 0 | 1840 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1841 if (retcode < 0) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1842 return -1; |
| 0 | 1843 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1844 /* The surface is now accelerated */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1845 surface->flags |= SDL_RLEACCEL; |
| 0 | 1846 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1847 return (0); |
| 0 | 1848 } |
| 1849 | |
| 1850 /* | |
| 1851 * Un-RLE a surface with pixel alpha | |
| 1852 * This may not give back exactly the image before RLE-encoding; all | |
| 1853 * completely transparent pixels will be lost, and colour and alpha depth | |
| 1854 * may have been reduced (when encoding for 16bpp targets). | |
| 1855 */ | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1856 static SDL_bool |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1857 UnRLEAlpha(SDL_Surface * surface) |
| 0 | 1858 { |
| 1859 Uint8 *srcbuf; | |
| 1860 Uint32 *dst; | |
| 1861 SDL_PixelFormat *sf = surface->format; | |
| 1862 RLEDestFormat *df = surface->map->sw_data->aux_data; | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1863 int (*uncopy_opaque) (Uint32 *, void *, int, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1864 RLEDestFormat *, SDL_PixelFormat *); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1865 int (*uncopy_transl) (Uint32 *, void *, int, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1866 RLEDestFormat *, SDL_PixelFormat *); |
| 0 | 1867 int w = surface->w; |
| 1868 int bpp = df->BytesPerPixel; | |
| 1869 | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1870 if (bpp == 2) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1871 uncopy_opaque = uncopy_opaque_16; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1872 uncopy_transl = uncopy_transl_16; |
| 0 | 1873 } else { |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1874 uncopy_opaque = uncopy_transl = uncopy_32; |
| 0 | 1875 } |
| 1876 | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
1877 surface->pixels = SDL_malloc(surface->h * surface->pitch); |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1878 if (!surface->pixels) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1879 return (SDL_FALSE); |
|
944
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
Sam Lantinga <slouken@libsdl.org>
parents:
880
diff
changeset
|
1880 } |
| 0 | 1881 /* fill background with transparent pixels */ |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
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|
1882 SDL_memset(surface->pixels, 0, surface->h * surface->pitch); |
| 0 | 1883 |
| 1884 dst = surface->pixels; | |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1885 srcbuf = (Uint8 *) (df + 1); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1886 for (;;) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1887 /* copy opaque pixels */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1888 int ofs = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1889 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1890 unsigned run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1891 if (bpp == 2) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1892 ofs += srcbuf[0]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1893 run = srcbuf[1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1894 srcbuf += 2; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1895 } else { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1896 ofs += ((Uint16 *) srcbuf)[0]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1897 run = ((Uint16 *) srcbuf)[1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1898 srcbuf += 4; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1899 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1900 if (run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1901 srcbuf += uncopy_opaque(dst + ofs, srcbuf, run, df, sf); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
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changeset
|
1902 ofs += run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1903 } else if (!ofs) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1904 return (SDL_TRUE); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1905 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1906 while (ofs < w); |
| 0 | 1907 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1908 /* skip padding if needed */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
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changeset
|
1909 if (bpp == 2) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1910 srcbuf += (uintptr_t) srcbuf & 2; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
1911 |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1912 /* copy translucent pixels */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1913 ofs = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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|
1914 do { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1915 unsigned run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1916 ofs += ((Uint16 *) srcbuf)[0]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1917 run = ((Uint16 *) srcbuf)[1]; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1918 srcbuf += 4; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1919 if (run) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1920 srcbuf += uncopy_transl(dst + ofs, srcbuf, run, df, sf); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1921 ofs += run; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1922 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1923 } |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1924 while (ofs < w); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1925 dst += surface->pitch >> 2; |
| 0 | 1926 } |
|
944
cdea7cbc3e23
Date: Wed, 28 Jul 2004 14:56:57 +0800
Sam Lantinga <slouken@libsdl.org>
parents:
880
diff
changeset
|
1927 /* Make the compiler happy */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
|
1928 return (SDL_TRUE); |
| 0 | 1929 } |
| 1930 | |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1931 void |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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|
1932 SDL_UnRLESurface(SDL_Surface * surface, int recode) |
| 0 | 1933 { |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1934 if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1935 surface->flags &= ~SDL_RLEACCEL; |
| 0 | 1936 |
|
1895
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1937 if (recode && !(surface->flags & SDL_PREALLOC) |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1938 && !(surface->flags & SDL_HWSURFACE)) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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changeset
|
1939 if ((surface->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
1940 SDL_Rect full; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1941 unsigned alpha_flag; |
| 0 | 1942 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
1943 /* re-create the original surface */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1944 surface->pixels = SDL_malloc(surface->h * surface->pitch); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1945 if (!surface->pixels) { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
1946 /* Oh crap... */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1947 surface->flags |= SDL_RLEACCEL; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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changeset
|
1948 return; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1949 } |
| 0 | 1950 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
1951 /* fill it with the background colour */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1952 SDL_FillRect(surface, NULL, surface->format->colorkey); |
| 0 | 1953 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents:
1456
diff
changeset
|
1954 /* now render the encoded surface */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1456
diff
changeset
|
1955 full.x = full.y = 0; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
1956 full.w = surface->w; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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|
1957 full.h = surface->h; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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1456
diff
changeset
|
1958 alpha_flag = surface->flags & SDL_SRCALPHA; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff
changeset
|
1959 surface->flags &= ~SDL_SRCALPHA; /* opaque blit */ |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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1456
diff
changeset
|
1960 SDL_RLEBlit(surface, &full, surface, &full); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff
changeset
|
1961 surface->flags |= alpha_flag; |
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1962 } else { |
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1963 if (!UnRLEAlpha(surface)) { |
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1964 /* Oh crap... */ |
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1965 surface->flags |= SDL_RLEACCEL; |
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1966 return; |
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1967 } |
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1968 } |
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1969 } |
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1970 |
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1971 if (surface->map && surface->map->sw_data->aux_data) { |
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1972 SDL_free(surface->map->sw_data->aux_data); |
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1973 surface->map->sw_data->aux_data = NULL; |
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1974 } |
| 0 | 1975 } |
| 1976 } | |
| 1977 | |
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1895
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1978 /* vi: set ts=4 sw=4 expandtab: */ |